Float-operated circuit closer



C. E. CRNDALL ET AL FLOAT PERATD CIRCUIT CLOSER l Filed May 4. 1921 SY 770mm Il TTRNEYS ermee" ED'WLEDCRANDALL HNE) FREMN El MNNESGTA.

implication fil-eci l-ay Zi,

` ers, of which the following 'is a description.

lll

The general ohjeet'e our invention is to provide ineens to entoninticeily sound en elerrn snch es en eieetrie buzzer., hell. or similar electric appliance when the oil in the crank ease oi' en :iutoniohile engine or other oonteiner te which ,the device is applied has reached e predetermined level. or levels, that is to sii-jv when the said liquid shall have reached e predetermined high level or a predetermined .lower level, whereby to antorneticelly give a signal.

More speciiicelly, the invention has in view to provide e device 01"' the indicated type, improved in various particulars with n View to promote elliciencv in operation, simplicity of assemblage` and convenience o adjustment and control.

The nature of the invention, its distinguishing features and advantages will appear as the description proceeds.

l`Reference is to he had to the accompanying drnvvinzs forming e part of the specification.y it heine' underetood that the drawings are merel)v illustrative of one exemple of the invention.

Figure l is e vertical section oi an nlzirni embodying our invention: l

Figure Q- is a horizontal section on the line 2 2. Figure l:

Figure 3 is a plan view ot the lower spiden "for centering the valve rod :ind float guide.

In carrying out our invention in accordance with the illustrated exemple :i reservoir l@ is provided, to receive oil, e given level. or levels` oi' which ere'to he indicated. ln the central opening in the top of said reservoir is a plug lllenged :it its lovver end to lie against the under side oi' Jdie reservoir top so that .the plugl extends nhove the top. Said ping has en axial here 12 and e, valve sent i3 is formed at the lower end Aof said here. A valve 174 is provided one verti the here i2 andai suspenijled on en which is hent neon in adjusting upper sind iovver hears upon ehe u of the screw lis/v with the lower a 'tension the i tor closing the circuit An insulating yloci; of the reservoir i0 and en i. i9 beneath the hloclf ot' the spring i6 passes over threaded end of 'the nini? il and che insulating; hlecl :1re clamped h v :i ent said hiock :ind plete l through which sind ping plaie i9 is provided to protect the binding screwv@ il which extends verticallyv through the nlug; i9 from the under side and receives binding nuls Q3 ior the conducter terminal 2l. the other conductor terminal Q5 hein@ .secured h v n screw 23 in nieteiliocontact .vi'ii the 35 reservoir lll or otherwise arranged to romplete :in electric circuii of e hunner. hell, or other electric alarm (not shown),

Nuts 23 clamp the horizoniel hnse oi en npsinndinf xed Contact 26. the upper end Q0 oi which is given n liliend :is ni 2'? `to lie nhnve and' helmv .the adjacent iree cri'd '18"- of the npner erm of the spring l6. eniil end lia fonstiuingA :i n'u'ivehie Contact. element.

A een-like housing' 25% nis on fr? the ces 95 ing l0 and rests on :in ennnier shoulder 10a thereon 'to house the contacts. 'terminal etc., disposed nloove the tono? the. reservoir.

The plug ll is provided with :i central bore 12 in which is adapted iov vertical 109 movement the ripper end oi thevalvc rod lil". the loivec end of which passes through e here in the hose 30 carried h v the' spider 29. which spider is arranged ai lover end of the ,reservoir 10, Bv t" nrrsingie- G5 lL Acel more* nient with respect to the eine l sind the spider 29. i epe; and loner nuls or internelly threaded eol r Si) :are provided on the /velve plug lff shove end helen the l@ provid-e,t i.

'ioat 15 to be adjustable to'various positions other liquid container, the level of whichv is to control the alarm. y

With the described arrangement as liquid rises above a predetermined level in the reservoir 10, the rising of the iloat 15 to engage the upper collar or nut 31 will engage the movable contact 16a with the upper overhanging end of the fixed contact 26. At the same time, the valve 14 will be moved against its seat 13, thereby preventing the escape of air and preventing the further entrance of oil or li uid to the reservoir. On the other hand fal ing of the liquid level in the reservoir to a predetermined point `will cause the float 15 to fall and-engage the lower nut or collar 32 and draw the valve rod 111a downwardly againstthe Atension of its suspending spring 16 until the movable contact 16' engages the fixed contact 26 at the lower portion of the Usbend 27 thereof.

We would statein conclusion that while the illustrated example constitutes a practical embodiment of ,our invention, we do not limit ourselves strictly to the exact details herein illustrated, since manifestly the same can be considerably varied without departure from the spirit ofthe invention as ing said plug and insulatin 'block'againsb reservoir slidable alongy said rod, adjustable means threaded to the lower end of said rod at both sides 'of said float to be engaged by the float when the-fluid level within the reservoir reaches a predetermined high or low point, and' means on said'insulating block ada ted to be engaged by the free leg of said -shaped member whenever sai float engages said means. l

2. In a level alarm in combination with a reservoir formed at its upper end with an opening and provided vat its lower end with a s ider having a central opening, a floatwit in said reservoir, `a plug having anannular flange at one end extending through said opening, and having said flange bean ing against the inner face of said upper end of the reservoir, said plug and said oat having centrally-extending bores alined with each other and alined with the opening `in the spider means clamping said plug in place, a spriii element const1tuting a movable electrica? contact held between said means, a rod threaded for thegreater portion of its len suspended on said s ring contact and slidably extending throug the bores in the plug and reservoir and through said o ening in the-spider, nuts on said rod at eacli side of said diaet adalted to be engaged by said oat upon the atter moving a predetermined, distance with the changin of the luidlevel, v'said rod moving said sprin when said float en ages either one of said nuts, and meansa jacent said 'plug adapted to be engaged by said spring an thereby closing an electrical circuit whenever said spring is moved by said float.

CHARLES EDWARD CRANDALL. FREMoN'r MAnoELis CRANDALL. 

